The RCAF operated a single RY-3 Privateer (RAF Liberator C.IX), (Serial No. JT973), ex-USN RY-3 (BuNo. 90021), aka the "Rockcliffe Ice Wagon". It was on loan from the RAF from 1946-1948. JT973 was used for icing research by the RCAF Experimental & Proving Establishment in cooperation with the National Research Council, and was based at RCAF Station Rockcliffe, Ontario. A lack of spare parts kept her grounded much of the time, and was scrapped in 1948 or 1949. She was replaced in her ice research duties by RCAF North Star (Serial No. 17513), which was modified with a dorsal wing section on the fuselage and observation blisters. (Group Captain)